Drum fire-plug.



G. E. HARGREA'VES. DRUMvFIRB PLUG..

APPLIUATION FILED JUNE 2, 190B.

Patented Nov.1, 1910.

l Grimma/135i.

GEORGE EDW. HARGREAVES, OF OREGON CITY, OREGON.

:DRUM FIRE-PLUG.

Specification of Letters Patent.

Patented Nov. 1, 1910.

Application filed .Tune 2, 1909. Serial No. 499,809.

To all whom it may concern:

Be it known that I, GEORGE EDW. HAR GREAvEs, a citizen of the United States, residing at Oregon City, in the county of Clackamas, State of Oregon, have invented a device, which I designate a drum lire- Elug, to prevent buildings from catching rethrough empty or insufficiently-protected apertures in a chimney or flue.

This invention relates to flue caps and refers particularly to an attachment thereto wherein a drum or chamber is formed to produce a fire-proof space for the prevention of the passage of flames, upon the burning of soot or the like within the flue, into the rooms of the building.

The invention has for another object the provision of a device of this character which is of simple form and which includes but few parts, so arranged that the same can be readily applied within the thimble of common -form positioned through the partition between the flue and the inner walls of the room.

The invention has for a further object a device of this character which forms a separate compartment within the thimble, which can be readily removed and positioned, as the relative arrangement of the several elements are such that they can be easily handled, and a device which can be economically manufactured so as to be within the reach of the 'general public.

For a full understanding of the invention and the merits thereof and also to acquire `a knowledge of the details of construction,

reference is to be had to the following description and accompanying drawing, in which Figure 1 is avertical section through a portion of a wall disclosing the improved cap applied thereto; Fig. 2 is a similar view, disclosing a slightly modified form of the device; Fig. 3 discloses a side elevation of a slight modiiication of the heads employed; Fig. 4 is a section taken on the line 4--4 of Fig. 3; and Fig. 5 is a detail perspective `View of the bolt and its attachments for rel I tremity of the bolt 23 and against the head taining the disks in position.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing by the same reference characters.

Referring to the drawing, 10 designates a wall having a vertical iue 11 communicating with a thimble 12 extending through the inner portion of the wall 10. lVithin the thimble 12 are arranged a pair of spaced heads 13 and 14 which are formed of metallic disks being centrally apertured for the reception of a retaining bolt 15. The means employed for spacing the heads 13 and 14 from one another to form the lireproof compartment within the thimble 12 comprises the pins 1G which engage through the bolt 15 and against the inner faces of the heads 13 and 14. The bolt 15 is threaded at its outer end to receive a clamping nut 17. The nut 17 carries laterally extending wings 18 by means of which the operator is enabled to rotate the nut 17 for engagement against the outer face of the head 13. The outer extremity of the bolt 15 is of such length as to extend beyond the end of the clamping nut 17, and is received within an internally threaded boss 19 formed centrally upon the inner face of a convexed cap 20.

The cap 20 engages against the outer face of the wall 10 and is held in position by the bolt 15. The heads 13 and 14 are preferably formed of substantially the same diameter as that of the thimble 12, so as to wedge or bind within the thimble and to be frictionally retained in such position. It is noted from this construction that the drum is formed having end closures in the form of the heads 13 and 14 and having a body portion in the form of the thimble 12.

In Fig. 2 of the drawing, the modification discloses a thimble 21 having a head 22 of disk form which is centrally apertured to receive a headed bolt 23. The bolt 23 extends outwardly from the head 22 and supports, adjacent its outer extremity, a second head 24. The head 22 engages frictionally within the thimble 21 and carries a tubular member 25. The member 25 is of a diameter slightly reduced from the diameter of the thimble 21, and engages between the heads 22 and 24. The bolt 23 carries pins 26 which are diametrically positioned through the bolt to seat against the opposite inner faces of the heads 22 and 24. The clamping nut 28 engages over the outer threaded eX- 24 to clamp the heads 22 and 24 against the opposite ends of the tubular member 25.

The modified form of the head, disclosed in Fig. 3, includes a circular frame 31 provided with a cross brace 32 diametrically secured upon the frame 3l and provided with a central opening 34 through which the clamping' bolt 15 passes. Stretched across the frame 31, and reinforced bythe brace 32, is a fine Wire meshing 33 forming the body of the head. The meshing 33 is designed to prevent the passage of flames through the thiinble and to admit the free circulation of air through the same.

It is readily observed from this construction that the heads 13 and 14 are wedged Within the thimble 12 and are held in such position in spaced relation by the pins 16, thus forming a drum or fire-proof chamber which is spaced inwardly from the cap 20. The cap engages against the outer face of the Wall and may be formed in any suitable manner for decorative or other purposes. The positioning of the device disclosed in Fig. 2 necessitates the Wedging of the heads 22 and 24 Within the thimble 21 to hold the tubular member 25 in position.

In lieu of the heads 22 and 2&1, the improved frame 31 may be employed With the covering of Wire meshing 33 to form a fireproof lchamber Within the thimble, and to admit of the passage of air through the thimble for the purposes of ventilation.

Having thus described the invention, What I claim is:

1. A flue cap including a pair of spaced heads for binding engagement Within a thimble, a bolt extending through the heads and beyond the outer one of the heads, pins arranged through the bolt and against the inner faces of the heads, and a clamping nut disposed upon the outer end of the bolt to secure the heads thereon.

2. A flue cap including a pair of spaced heads for binding engagement Within a thimble, a bolt carried through the heads and extending outwardly therefrom, a clamping nut carried upon the bolt adjacent its outer end to seat against the adjacent head, pins arranged through the bolt and against the inner faces of the heads to hold the same in spaced relation, and a cap carried upon the outer end of the bolt for engagement over theV end of the thimble.

3. A iiue cap including a pair of spaced heads for binding engagement Within a thimble, a bolt arranged through the heads,

a clamping nut carried by the bolt to secure the heads thereon, pins carried through the bolt and against the heads to hold the same in spaced relation, and a cap detachably engaging over the outer end of the bolt and over the adjacent end of the thimble. Signed this 27 th day of May 1909.

GEO. EDVV. HARGREAVES.

lVitnesses:

lV. S. UREN,

C. SCHUEBEL. 

